Mount Semeru Erupts Again This Evening, Ash Column Reaches Approximately 700 Meters

Mount Semeru in East Java erupted again on Friday, February 21, 2025, at 4:21 PM WIB. In the last week, Mount Semeru has erupted 74 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the ash column height was observed to be approximately 700 meters above the peak (4,376 meters above sea level).

The ash column was observed to be white to gray with thick intensity towards the east. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 132 seconds.

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level II (Alert). Observations of seismic activity on February 21, 2025, from 00:00 to 23:59 WIB showed 56 eruption quakes with amplitudes of 11-23 millimeters and durations of 76-182 seconds.

Then, there were 8 puffing quakes with amplitudes of 2-8 millimeters and durations of 42-98 seconds, and 2 harmonic tremors with amplitudes of 3 millimeters and durations of 105-182 seconds.

PVMBG advises against any activity in the southeast sector along Besuk Kobokan, up to 8 kilometers from the peak (eruption center). Outside this distance, the public should not engage in activities within 500 meters of the riverbank (river buffer zone) along Besuk Kobokan due to the potential for pyroclastic flow and lahar flows extending up to 13 kilometers from the peak.

During 2025, MAGMA Indonesia has recorded 1,447 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java has experienced the most eruptions, with 712 eruptions.